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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 15 — Jul. 19, 2010
  • pp: 16264–16272

Terahertz inverse synthetic aperture radar (ISAR) imaging with a quantum cascade laser transmitter

Andriy A. Danylov, Thomas M. Goyette, Jerry Waldman, Michael J. Coulombe, Andrew J. Gatesman, Robert H. Giles, Xifeng Qian, Neelima Chandrayan, Shivashankar Vangala, Krongtip Termkoa, William D. Goodhue, and William E. Nixon  »View Author Affiliations


Optics Express, Vol. 18, Issue 15, pp. 16264-16272 (2010)
http://dx.doi.org/10.1364/OE.18.016264


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Abstract

A coherent transceiver using a THz quantum cascade (TQCL) laser as the transmitter and an optically pumped molecular laser as the local oscillator has been used, with a pair of Schottky diode mixers in the receiver and reference channels, to acquire high-resolution images of fully illuminated targets, including scale models and concealed objects. Phase stability of the received signal, sufficient to allow coherent image processing of the rotating target (in azimuth and elevation), was obtained by frequency-locking the TQCL to the free-running, highly stable optically pumped molecular laser. While the range to the target was limited by the available TQCL power (several hundred microwatts) and reasonably strong indoor atmospheric attenuation at 2.408 THz, the coherence length of the TQCL transmitter will allow coherent imaging over distances up to several hundred meters. Image data obtained with the system is presented.

© 2010 OSA

OCIS Codes
(040.2840) Detectors : Heterodyne
(110.1650) Imaging systems : Coherence imaging
(280.6730) Remote sensing and sensors : Synthetic aperture radar
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade
(110.6795) Imaging systems : Terahertz imaging

ToC Category:
Imaging Systems

History
Original Manuscript: June 2, 2010
Revised Manuscript: July 7, 2010
Manuscript Accepted: July 9, 2010
Published: July 16, 2010

Citation
Andriy A. Danylov, Thomas M. Goyette, Jerry Waldman, Michael J. Coulombe, Andrew J. Gatesman, Robert H. Giles, Xifeng Qian, Neelima Chandrayan, Shivashankar Vangala, Krongtip Termkoa, William D. Goodhue, and William E. Nixon, "Terahertz inverse synthetic aperture radar
(ISAR) imaging with a 
quantum cascade laser transmitter," Opt. Express 18, 16264-16272 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-15-16264


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References

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